Warp stop-motion for looms.



No. 784,339. PATBNTED MAR. '7, 1905. J. E. LEMYRE.

WARP STOP MOTION FOR LOOMS. APPLICATION FILED 1330.4, 1903.

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UNITED STATES Patented March '7, 1905.

PATENT OEEIcE.

JOSEPH E. LEHYRE, OF MANCHESTER, NEW HAMPSHIRE, ASSIGNOR, BY

MESNE ASSIGNMENTS, TO HUGH H. MAW HINNEY, OF BOSTON, MASSA- OHUSET S.

WARP STOP-MOTION FOR LOOIVIS.

SPECIFICATION forming part of Letters Patent No. 784,339, dated March '7, 1905.

Application filed December 4, 1903. Serial No. 183,714.

To n whom, it Duty concern:

Be it known that l, J OSEPH E. LEMYRE, a citizen of the United States, and a resident of Manchester, in the county of Hillsboro and 3 State of New Hampshire, have invented new and useful Improvements in arp Stop-Motions for Looms, of which the following is a specification.

Lily invention relates to warp stop-motions 10 for looms, and particularly to warp stop-motions of the class shown and described in United States Patent No. 735,785, granted to me August 11, 1903. In warp stop-motions of this class the warp-detectors are normally held out 5 of the path of a feeler by the war1')-threads,

and when a warp breaks the detector supported by that thread drops into the path of the feeler and acts upon that feeler to stop the loom. The detectors themselves are neces- 2o sarily made from very thin sheet metal, and when in engagement with the warps each is supported in a vertical plane by its lower edge resting upon a warp-threzul. In order to provide for free and independent movement of each detector, the detectors are necessarily held together more or less loosely, and as a result the joints between the detectors are more or less open and have heretofore been free to admit line threads, which would result in a false operation of the stop-mtion or breakage of the threads. My invention has for its object to improve the construction of warp stop-motions to the end that the'objectionable feature noted may be obviatedthat is, to provide an improved warp stop-motion wherein the warp-threads are prevented from entering between the detectors and causing a false operation of the stop-motion.

In accordance with my invention each detector is made upon one side with a tongue and upon its opposite side with a groove, so that when all of the detectors are assembled in a row the tongue of each detector projects laterally into the groove of the detector at one side of it, and its groove receives the tongue of the detector at the opposite side of it. In

this way the joint at each side of each detector is broken and made so irregular that a warp-thread, however fine, cannot pass into either joint and cause a false stop or breakage of the thread. This construction also does not require that the detectors when assembled shall occupy any more space than heretofore.

In the best form of my invention the detectors are of the pivoted type shown and described in the patent above noted, and both the tongue and groove are arcs concentric with the axis of the detector or substantially so.

In the accompanying drawings, Figure l is a view of one side of a warp-detector and shows also by dotted lines some adjacent parts of a loom. Fig. 2 is a plan view of a row of detectors. Fig. 3 is a plan view of a single detector. Fig. 4 1s a view of the other sale of the detector shown in Fig. 1.

In my improved stop-motion for looms, as herein shown, each detector A is made with a pivot-point (t at one end, adapted to rest upon the detector-bar B (indicated by dotted lines) and carried by the lay, as usual. At its opposite end the detector is made with a downwardly-extending arm 0, adapted to engage one of the upper warp-threads 6 (indicated by dotted lines) when the shed is formed. This arm a is made, as usual, with two [ins or wings a, adapted to engage the reed Z) (indicated by dotted lines) in the usual manner. Herein I have shown each detector A as also made with an upwardly-feeler-engaging arm (15, the purpose of which is to adapt the detector to embodiment in a stop-motion of peculiar structure and different from that shown and described in the patent above notedthat is, the feeler herein shown is peculiarly shaped to adapt it to be used in a stop-motion wherein the feeler is arranged somewhat differently from what it is in said patent; but, as will be clear, the shape of the detector is wholly immaterial to my invention and may be varied to suit the particular form of mechanism with which it is to cooperate.

One side of'each detector is made with a curved tongue a substantially concentric with the axis of the detector and directly opposite a curved groove (0 upon the opposite side of the detector and also concentric with the axis of the detector. \Vhen the detectors A are assembled in a row, as shown in Fig. I, the

position they occupy in the loom, the tongue of each detector occupies the groove of the adjacent detector at one side, and the tongue of the detector at the opposite side occupies the groove of that detector, so that the joints at the sides of each detector are broken or of irregular shape, and the Warp-thread with which that detector cooperates and Which is straight because of the tension on it cannot enter either of said joints and permit the de tector to drop and cause a false stop of the loom.

Another advantage of the tongue andgroove construction is that it connects the detectors so that they are held in alinement, and, moreover, with said construction it is not necessary to have the detectors held together so closely as has heretofore been necessary, and therefore they can be made lighter Without detracting from their sensitiveness to the breaking of a thread.

What I claim is 1. In a loom, a row of warp-stop-motion detectors each made with a tongue on one side and a groove on the opposite side, the tongue of each detector fitting into the groove of the next detector on one side, and the groove of each detector receiving the tongue of the next detector on the opposite side.

2. A Warp-detector made with a tongue on one side and a groove on the opposite side.

3. A Warp-detector having a part adapted to act as a pivot made With a curved tongue on one side and a curved groove on the opposite side, said tongue and groove both concentric With the pivot of the detector.

4. In a Warp-stop-motion device for looms, a series of Warp-detectors, in lateral tongueand-groove mutual engagement.

Signed by me at Boston, Massachusetts, this 23d day of October, 1903.

JOSEPH E. 'LEMYRE. 

